Paper-making machine



y 3, 1930. w. H. MILLSPAUGH 1,758,167

PAPER MAKING MACHINE Filed July 1, 1929 2 Sheets-Sheet 1 May 13, 1930. w. H. MILLSPAUGH PAPER MAKING MACHINE Filed July 1, 1929 2 Sheets-Sheet 2 9 i QQQQQQQQGGQQGOOGOGQG O0 r y k W I fizz/212$? Patented May 13, 1930 UNITED STATES PATENT- OFFICE WILLIAM H. MILLSPAUGH, OF SANDUSKY, OHTO, ASSIGNOR TO THE 6'0 TEXTILE -MACHINERY COMI ANY, OFSANDUSKY, OHIO, A CORPORATION OF OHIO .EAIPER-MAKING MACHINE Application filed July 1, 1929. Serial No. 374,981.

This invention relates to paper making machines of the vacuum formlng cyhnder type, and aims to improve such machines w1th reference to the means for laterally confining the 5 1i uid stock on the forming cylinder.

. xamplesof vacuum forming'cylinder machines are disclosed in my pending applications -Serial Nos. 610,538, and 610,539, filed January 3,1923, Ser. No. 29,600, filed May 11, 1925, and Ser.zNo. 123,757, filed July 20,

An illustrative embodiment of my present view being taken on the vertical section line- 3-3 of Fig. 1, looking in the direction of the arrow, and the figure being contracted for convenience of illustration by showing the vat side walls relatively close together and breaking away the intermediate portion of the cylinder andvat.

Referring to the drawings, 1 denotes the vacuum forming cylinder, which comprises a revolving suction roll having suitable suction box equipment in connection with pumping apparatus adapted ifor maintaining desired vacuum action against liquidst'ock supplied on the cylinder and for discharging the large amounts of waterwhich are removed from the liquid stock in the process "of vacuum-inducedv wet sheet formation. As shown, the suction roll consisting of a closely perforated metal shell contains a stationary suction box 2 bearing against the interior surface of the cylinder and cooperatin therewith to provide the forming vacuum c amber 3 and a supplemental vacuum chamber 4. These chambers connect with their respective pumping apparatus through the pipes 3 an 4. i f

A porous medium covering the active portion' of the vacuum .forming cylinder is supplied in this instance by the endless apron 5 of fine wire cloth, hereinafter called the wire, which passes around and is driven by the rotating cylinder. The direction of rotation of the cylinder and travel of the wire is indicated by the arrow in Fig. 1. The wire in addition to supplying the surface upon which the wet paper sheet forms, serves also to carry ofi' the sheet from the cylinder. The. wire may deliver the sheet in contact with anothersimilarly formed sheetonan ther-wire formaking plural ply aper, or it may deliver the sheet to a press elt in the manufacture of single pl paper. 7

he prepared liquid stock or pulp solution for forming the paper is supplied to or flows against the cylindricalformin surface provided by the wire-covered portion of the cylinder, and is subjected to the action of suit able vacuum in the confronting vacuum chamber 3, inducing wet sheet formation as explained in my applications aforesaid. As

shown, the formlngfvacuum area established by the vacuum chamber 3 extends beyond or a ove the level of the contacting liquid body, so that the wet web or sheet emerges from the liquid under continued exposure to the forming vacuum, thereby holdin the formation intact and exerting a consoli ating and moisture-reducing action on the emerging sheet. As the sheet passes over the succeeding vac uum chamber 4, it is subjected to further moisture-reducing action by the vacuum therein, which vacuum maybe independently regulated-to temper the moisture content as de sired in case the sheet is to be bonded with 90 another sheet or sheets for formation of plural ply paper.

An open-ended-vat or holder 6 coo erates ,with' the cylinder to hold the liqui stock,

which is continuously supplied to the vat from a source of supply and may by appro- I priate means be maintamed at a desired level. The ends of the vat side walls adjacent to the cylinder are provided by the plates 7 having concave edges conforming to the curvature 1 vided by such plates, leaving, the slight crevices between the concave fedge's of the plates and the cylindrical formin surface immediately adjacent to the crevices between said plates and the cylindrical forming SUP-f face; the liquid being held from running out through said crevices by the outside atmospheric pressure, assisted by the damming effect of the layer offibers gradual;

ly building'up on the cylinder. l 1

It will be seen that the plates 7 cooperate with the wire-covered portionof'the cylinder 30 pi'ovide what'may betermedstationary esurfaces. According to the present invention, these deckle surfaces are disposed 2 in planes slightly. oppositely oblique to planes at right angles to the axis of the cylinder so that the opposite deckle surfaces di-' verge slightly in the direction of'the travel of the cylinder. In the particular construction shown, where the liquid stock'bearson its ascending side, the plates are slightly oppositelyiinclined to the vertical so that the plates are somewhat farther at the top .than at the bottom, producing the divergence referred to. This will be apparentfrom Fig. 2, where it will be seenthat the concave edges 8 of theplates diverge slightly from the bot- *tom of the vat .toward the top. The purpose and advantage of this arrangement is t'orelieve the edges of the sheet from frictional engagement with the plates, or to reduce such frictional engagement to a" minimum. The vacuum-induced deposition cylindrical forming surface travels in contact with the liquid body .past the vacuum chamber 3, so that the sheet-is progressivescribed,.the progressive building up of the edges of the sheet takes place at progressively receding surfaces, thus relieving the friction.v v 4 For clarity of illustration, the drawings somewhat exaggerate the divergence'of the Q plates, which in practice may be very slight. or example, in a machine such asillustrated in'the drawings having the plates! fifteen' ed inches high, an inclination of each plate "to the vertical, producing a total divergence of ,4 is found suflicient; The divergence should not be'too great lest the sheet should form with its edges tapering to a feather edge. Thus the plates while arranged to open to the atmosphere. The s eet *will 1 form on the. edges defined by said plates, i. e.,

a lateral segmentof the forming cylinder at of fibers to formthe sheet is continlfous isthe ly built up on the forming surface. With the arrangement of the decklesurfaces de-- provide slight divergence described, are

at the same time substantially or approximately vertical within the meaning of my aforesaid applications.

The plates 7 may be of metal or other suitable materiaL. As in the case of the constructions disclosed in my aforesaid applications, the said plates are shown afiixed as facing 'lates to laterally adjustablevati wall mem ers 9'.- Said members have base flanges and adjust'ably' secured thereto by the slot and bolt connections 11; and lateral flanges connections 13 to lateral vat wall extensions 14. This is to permit-setting the deckle surfaces nearer together or, farther apart, according to the width of sheet to be made; it

being understood that the suction box chambers in the vacuum-forming cylinder have adjustment.

The numeral 15 sist in preventing leakage of pulp .liquid at that point.

It will be understood that the invention is not limited to the particular embodiment thereof herein shown and described.

- 0 bearing on extensions of. the vat bottom f12 adjustably se'cured 'by the slot and, bolt in'the drawings denotes a'rubber strip which is fitted in the angle be tween the vat bottom and the cylinder to as "What I claim as my invention, and desire f to secure by Letters Patent, is:

1. A paper making machine having a vacuum forming cylinder and an open-ended vat cooperating therewith to hold liquid stock on the'* ascending side of the cylinder, the vat side walls adjacent the cylinder comprising platesoppositely inclined to the vertical so astobe further apart at the top than at the bottom, said plates having concave edges eonforming to the curvature of and closely overlying the forming surface on the cylinder but not in actual contact therewith, -which edges, by'virtueof the inclination of said plates, d1- E'erge in the direction of rotation of'the cyliner 2. A paper making machine having a vacuum fornnng. cylinder and an open-sided vat cooperating therewith to hold liquid stock, the vat side walls adjacent the cylinder com prising plates having concave edges conforming to the curvature of and closely overlying the forming surface on the eylinderbut not in actual contact therewith and the said I plates being arranged so that the said edges diverge in the direction of rotation of the'f; cylinder. 3. A paper making machme having a .vacf uum forming cylinderand an open-ended vat "cooperating therewith to hold liquid stock, the vat side walls havingends conforming to the curvature of and closely adjacent to the v forming surface on the cylinder and the inner faces of said walls immediately adjacent; I

to the cylindrical forming surface. being'in' 85 adjustable heads or ends for corresponding I planes oppositely oblique to a lane at right angles to the cylinder axis an diver g in the direction of rotation of the cylin er;

4. A paper making machine having a vac- 6 uum forming cylinder and means for laterally confining liquid stock thereon comprising stationary plates having'concave edges. conforming to the curvature of and closely adjacent to the forming surface of the cylin- 10 'der, said plates arranged so that the said edges diverge in the direction of rotation of the cylinder.

5. A paper making machine-havin a vacuum forming cylinder and means for aterally confining liquid stock thereon comprising stationary plates having concave edges conforming to the curvature of and closely adjacent to the forming surface of the cylinder, the inner faces of said plates ad'acent the -said edges being in planes diverging in the direction of rotation of thecyli'nder.

6. A paper making machine having a vacuum forming cylinder and means for supplying liquid stock thereto and embodying stationary deckle surfaces diverging in the direction of rotation of the cylinder.

7 A paper making machine having a vac uum forming cylinder and cooperating later ally adjustable means providing stationary deckle surfaces, the said deckle. surfaces di- V verging in the direction of rotation of the cylinder.

In witness whereof, I have signed my name to this specification.

WILLIAM H. MILLSPAUGH.' 

